编写php/mysql代码的最短方法是什么,该代码将所有与某个帖子相关的"喜欢"分组,甚至显示单击"喜欢"按钮的人,如以下示例所示:
约翰,玛丽,布莱恩和其他人喜欢这个评论
由于除了您想要的内容之外,您没有提供任何其他详细信息,因此这一切都基于对数据库如何设置的假设。
SQL查询:
SELECT * FROM likes WHERE (comment or post id) = 'ID'
post_id是您想要分组的内容,因此,例如,如果每个评论都有自己的ID,那么您希望按该ID对喜欢进行分组。
我的数据库是这样设置的:
字段:id、comment_id、post_id、名称
所以你会这样:
+--------------+---------------+--------------+--------------+
| ID | comment_id | post_id | name |
+--------------+---------------+--------------+--------------+
| 1 | 382 | null | John |
| 2 | 382 | null | Mary |
| 3 | null | 189 | Brian |
| 4 | null | 189 | Joe |
| 5 | 382 | null | Ryan |
| 6 | 382 | null | Bell |
+--------------+---------------+--------------+--------------+
因此,如果您使用 SQL 脚本:
SElECT * FROM likes WHERE comment_id = '382'
您将获得以下内容:
+--------------+---------------+--------------+--------------+
| ID | comment_id | post_id | name |
+--------------+---------------+--------------+--------------+
| 1 | 382 | null | John |
| 2 | 382 | null | Mary |
| 5 | 382 | null | Ryan |
| 6 | 382 | null | Bell |
+--------------+---------------+--------------+--------------+
然后,您将运行一个脚本(假设它是PHP),如下所示:
$num = 0; // This is used as an identifier
$numrows = mysqli_num_rows($getdata); // Count the number of likes on your comment or post
if($numrows > 3) {
$ending = 'and others like this comment.'; // If there are more than 3 likes, it ends this way
} else {
$ending = 'like this comment.'; // If there are less than or equal to 3 likes, it will end this way
}
while($data = mysqli_fetch_array($getdata)) {
if($num => 3) { // This says that if the $num is less than or equal to 3, do the following
// This will be used to list the first 3 names from your database and put them in a string like: name1, name2, name3,
$names = $data['name'].', ';
// This adds a number to the $num variable.
$num++;
}
}
echo $names.' '.$ending; //Finally, echo the result, in this case, it will be: John, Mary, Ryan, and other like this comment.